And to Ukraine. Crimea preparing for a referendum deciding to break away or become part of Russia. Volunteers readying the polls. Balloons at one of the voting stations. Outside a reminder of the mistakes. A natural gas facility in another part of Ukraine. ABC in the region tonight Reporter: This crisis is deepening. Violence in eastern Ukraine today as pro-russia demonstrators stormed a Ukrainian security building. Fears are now growing of a large scale Russian invasion with Moscow saying it has gotten calls to intervene. With pro Russia protests growing in the east Russian troops are massing along the border to the south, Russian forces already control Ukraine's crimean peninsula. Where today we went to a rally supporting Sunday's referendum asking crimean's whether they want to join Russia the answer expected to be an overwhelming yes. The U.S. Has called the vote illegal, but crimea's pro Russia prime minister told us it is a people's right to decide which country they belong to. I'm telling you that out of 100 people he said 80 want to be a part of Russia. I'll bet you. Reporter: Tonight Ukraine said around 80 Russian troops along with helicopters seized a village outside crimea in Ukraine, the first possible evidence Russia may be expanding its invasion and that crimea could be just the beginning.

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